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TINA/Spice: lmh6629 & others

Other Parts Discussed in Thread: TINA-TI, LMH6629

Tool/software: TINA-TI or Spice Models

A few odd things I notice while trying to simulate simple circuits

- LMH6629 configured as simple non-inverting mode, shows negative output without gain being 2. By following  illustrations in the data sheet, could not get it give gain of 2 for an ac signal of 10mv/50 kHz. What  am I doing wrong here?. Pl see attached

- I am trying to implement a full wave ac signal rectification( actually it is a bipolar current from a power stage- so wide band signal) by using current feedback amplifiers( as shown in the attached picture). But cannot find a model of CFA whose output will disable negative values . This allows for unipolar output so when ac input is +, it gives + output, The rectifier based upon this principles is clearly capable of giving wideband low level ac signal rectification. What will be equivalent models in TINA-TI?

any help will be highly appreciated.

precision_rectifier.TSC